Arata Hinohara is the victim of high school bullying by old friends. Arata is a member of the ruling tribe of the world he inhabits. Suddenly, both Aratas are snatched by some sort of magical force and placed in a state of limbo, where they briefly see each other and hear both worlds calling out for Arata to return. They land in each other’s worlds, and must now deal with the challenges their counterparts faced.

After Lord Kannagi loses his Hayagami, he decides that his best course of action is to travel with Arata Hinohara and guide him to rule the world, even if the Earth boy doesn’t know if he wants to do so. They enter the land of Lord Yorunami, but before they progress any further, Kannagi tests Arata’s mettle....